Metal-bending machine.



No. 818,932. PATENTED APR. 24, 1906. D. M. BAXTBR.

METAL BENDING MACHINE.

APPLICATION FILED OUT. 25, 1905.

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No. 818,932. PATENTED APR. 24, 1906. D. M. BAXTER.

METAL BENDING MACHINE.

AlPLIOATION FILED OCT. 25, 1905.

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UNITED STATES PATENT OFFICE.

DAVID M. BAXTER, ()F NEWPORT NEIVS, VIRGINIA, ASSIGNOR OF ONE- HALF TO MAXWELL HILL BAXTER, OF NEIVPORT NEIVS, VIRGINIA.

METAL-SENDING MACHINE.

Specification of Letters Patent.

Patented April 24, 1906.

Application filed October 25,1905. Serial No. 284,318.

To all whom, it may concern: I

Be it known that I, DAVID M. BAXTER, a citizen of the United States, residing at New port News, in the county of l/Varwick and btate of Virginia, have invented certain new and useful Improvements in Metal-Bending Machines, of which the following is a specification.

My invention relates to metal-bending machines, and is intended for use in bending metal plates or light sheet-iron work.

The object of the invention is to so improve this class of machines as to produce a mechanism for the purpose intended which may be operated with facility and certainty to bend metal plates or sheet metal in the desired directions and to the requisite shapes.

The invention consists, essentially, of a rigid strong back or bending-brace and amovable strong back and pair of rolls with means whereby the movable strong back and rolls may be quickly and forcefully operated, the said means consisting, primarily, of hych'aulic cylinders and connections.

The invention further consists in certain novel features of invention and construction and combinations of parts, as will be specifically pointed out in the claims.

Referring to the drawings, Figure 1 illustrates in perspective a portion of my invention, showing the movable strong back and one roll and the means for operating them. Fig. 2 is a vertical central section showing the devices at the end of the machine opposite that shown in Fig. 1, it being understood that the devices are duplicated at each end of the machine and act on the same rolls and strong back; and Fig. 3 is a detail perspective view of the slide block and ways which support one end of one of the rolls.

Referring to the figures of drawings, the numeral 1 designates the housing or standards of the machine; 2, an immovable strong back or bending-brace rigid with the housing; 3, a movable strong back located directly above the brace 2 4, a hydraulic cylinder rigidly seemed to the housing or standard; 5, the piston-rod of the cylinder,rigidly connected at its lower end to the movable strong back 3; 6, guideways in which the strong back is adapted to travel and be guided as it reciprocates when operated from the cylinders 4; 7 7, two arms pivoted at the center of the machine and each extended outwardly therefrom; S, the common pivotpoint of said arms; 9 9, slide-blocks adapted to reci rocate and be guided by the ways 10 11 11, iydraulic cylinders rigidly held to the outer ends of the arms 7; 12 12, piston-rod having one end in the cylinder 1 1 and connected at its other end to the slide-block 9; 13 13, a pair of rolls located at each side of the immovable strong back or the center of the machine; 14, a journal-bearing in the slide-block to accommodate a-reduced journal on either end of the rolls; 15 15, hydraulic cylinders each pivoted to the housing and disposed on opposite sides of the center of the machine; 16 16, the pivots of the cylinders 15, and 17 17 the piston-rods having one of their ends in the cylinders 15 and their other ends pivoted at 18 through the lugs 19 19 on arms 7.

I have described the several operating-cyL inders as hydraulic cylinders; but it will of course be understood that I may use any other suitable motive fluid for working the machine.

The operation of the upper or movable strong back will be understood at a glance, the same being worked from the cylinders 4 and reciprocated vertically in the guides, as is desired. The pivoted arms, which carry the pair of rolls, may be raised or lowered at their outer ends by means of the motive fluid in the cylinders 15 exerting pressure on the piston-rods 17 to raise the arms, and of course when pressure is relieved in the cylinders the arms will fall by gravity. Thus the rolls 13 may be adjusted vertically, and as the two arms 7 have no close relation except that they are pivoted on a common center the rolls may be moved up or down independently of each other, as the performance of bending the metal may require. The rolls are also adjustable to or away from the center of the machine. By exerting pressure from the cylinders 11 11 the rolls may be moved on their sliding blocks 9 by admitting motive fluid at the required side of the piston within the cylinders. The lateral move ment of the rolls is lso independent one from another, and one roll may be moved close to the center, while the other is moved therefrom, as circumstances require. hen it is considered that the means for raising or lowl ering the roll and for moving the same later ally at one end of the machine is independent of the means for the same pur ose at the other end of the machine, it wil be understood that the plate or sheet between the rolls may be bent to the desired shape; but also a twist may be imparted thereto by a proper manipulation of the ends of the rolls.

In operation the plate which is to be bent is heated and drawn over the top edge of the immovable strong back 2. The movable strong back is then brought down upon the plate by pressure from cylinders 4, thus clamp-' ing the plate between the movable and immovable strong backs. The arm 7, as at the right in the figures of the drawings, is then forced upward by pressure from the cylinder 15, the lateral position of the roll having been predetermined, until the desired amount of bend is put in the plate. As the two ends of the roll move independently, one end may be higher than the other, and in this position when the roll is raised from the cylinders at the ends thereof a considerable amount of twist may be put into the plate. The other side of the plate may then be bent by the other roll, if desired.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination with amachine-frame, a rigid strong back connected thereto, and a movable strong back; of a pivoted arm, a roller journaled therein, means carried by said arm and connected to the roller for imparting lateral motion to said roller, and independent means connected to the arm for imparting vertical motion thereto.

2. In a metal-bending machine, a rigid strong back, a movable strong back, and a pair of arms pivoted in the machine, a roll j ournaled in each arm, means carried by each arm for moving its roll laterally, and independent means for imparting vertical movement to each arm, all combined substantially as described.

3. The combination in a metal-bending machine, a rigid strong back, a movable strong back, and a pair of arms pivoted in vertical alinement with said strong backs, rolls ournaled in the arms at each side of'the rigid strong back, means carried by each arm for independently moving the roll carried thereby, and means independently connected to each arm for imparting vertical movement thereto.

4. In a metal-bending machine, a rigid strong back, a movable strong back and guiding means therefor, and a hydraulic cylinder having its plunger connected to the movable strong back, a pair of arms pivoted in the machine, a roll journaled in each arm, means for moving each roll laterally, and means for moving each roll vertically.

5. The combination in a metal-bending movable strong back, with a slotted pivoted arm, a slide-block in said slotted arm, a hydraulic cylinder operatively connected to said block, and a roll having its end journaled in said block.

6. The combination in a metal-bending machine of a movable strong back and an immovable strong back, with a pair of slotted pivoted arms at one side of the immovable strong back, slide-blocks located in said slotted arms, a roll journaled in said slide-blocks, and a motive-fluid cylinder operatively connected to said slide-blocks.

7. The combination in a metal-bending machine of a movable strong back and an immovable strong back, with two pairs of slotted arms, each pair of arms being pivoted at a common center, slide-blocks in said slotted arms, a roll journaled in said blocks at each side of the pivot, and motive-fluid cylinders carried by the arms and operatively connected to the slide-blocks.

8. The combination in a metal-bending machine of a movable strong back and an immovable strong back, with a slotted pivoted arm, a slide-block in said slotted arm, aroll journaled in said block, a motive-fluid cylinder operatively connected to said block, and means for moving said arm on its pivot.

9. The combination with a movable stron back and an immovable strong back, with a slotted pivoted arm, a slide-block carrying a roll, in said slotted arm, a motive-fluid cylinder operatively connected to the block, and a motive-fluid cylinder pivoted to a rigid support and operatively connected to the pivoted arm.

10. The combination in a metal-bending machine of a movable strong back and an immovable strong back, with a pair of slotted pivoted arms at one side of the immovable strong back, slide-blocks located in said slotted arms, a roll journaled in said slide-blocks, a motive-fluid cylinder carried by each arm and operatively connected to the slide-block thereon, and a motive-fluid cylinder pivoted in the machine and operatively connected to each arm.

11. The combination in a metal-bending machine of a movable and arigid strong back, with two pairs of slotted arms, each of said pairs being pivoted at a common center, slide-blocks in the slotted arms, a roll journaled in said blocks at each side of the pivots, motive-fluid cylinders carried by each arm and operatively connected to a slide-block, and pivoted motive fluid cylinders operatively connected to each said arm.

12. The combination in a metal-bending machine comprising a movable strong back and an immovable strong back of two pairs of movable arms, a roll journaled in each pair or arms, lndependent means earned by said arms for moving the ends of the rolls separately, and independent means for moving each arm of the pairs.

13 The combination in a metal-bending machine comprising a movable strong back and an immovable strong back of two pairs of arms, each of said pairs being pivoted at a common center, a roll jonrnaled in each pair of arms, means carried by each arm for moving the roll ends independently in a lateral 1o direction, and independent means connected to each arm for moving said arm vertically. In testimony whereof I alliX my signature in presence of two witnesses.

DAVID M. BAXTER. Witnesses M. B. I'IERMAN, M. M. BAXTER. 

